<x-row space="1">
  <x-col span="12">
    <x-card>
      <x-countdown [value]="deadline" label="倒计时"></x-countdown>
    </x-card>
  </x-col>
  <x-col span="12">
    <x-card>
      <x-countdown [value]="deadline" label="倒计时（毫秒）" format="HH:mm:ss:SSS"></x-countdown>
    </x-card>
  </x-col>
  <x-col span="24" [style.margin-top.rem]="1">
    <x-card>
      <x-countdown [value]="deadline" label="倒计时（天）" format="D 天 H 时 m 分 s 秒"></x-countdown>
    </x-card>
  </x-col>
</x-row>
